/*
 * Copyright (c) 2011-2012  Cristian Constantin
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package com.quizio.engine.validator;

import com.quizio.engine.model.Option;
import com.quizio.engine.model.QuestionUserInput;
import com.quizio.engine.model.QuizSession;
import org.springframework.stereotype.Service;

/**
 * Parses quiz session user input and calculates the quiz score.
 *
 * @author Cristian Constantin
 * @since 1/21/12
 */
@Service
public class QuizValidationService {

    public void validateQuiz(QuizSession session) {

        Integer quizScore = 0;

        for (QuestionUserInput input : session.getQuestionsInputs()) {

            if (input.getAnswer() != null) {

                Integer questionScore = 0;

                Long answer = Long.valueOf(input.getAnswer());
                for (Option option : input.getQuestion().getOptions()) {
                    if (option.getId().equals(answer)) {
                        questionScore = option.getScore();
                    }
                }

                quizScore += questionScore;
            }
        }

        session.setScore((double) quizScore / session.getQuestionsInputs().size());
    }
}
